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Home › Buick › 2018 › LaCrosse Base › Repair and Diagnosis › Hybrid/Electric Powertrain › Electric Converters and Controllers › Hybrid/EV Control System › Diagnostic Information and Procedures › DTC P15F4 › Circuit/System Testing

Circuit/System Testing

NOTE:

Diagnose and repair any communication DTCs prior to performing this testing.

  1. Ignition On.
  2. Verify DTC P15F4 is not set.
    • If the DTC is set 
    1. Verify the K59 Starter/Generator Control Module has the latest calibration in Calibration Information.
      • If the K59 Starter/Generator Control Module does not have the latest calibration
      1. Program the control module: K59 Starter/Generator Control Module.
      2. Verify the DTC does not set.
        • If the DTC sets, Replace the component: K59 Starter/Generator Control Module
        • Go to next step: If the DTC does not set
      3. All OK.
      • Go to next step: If the K59 Starter/Generator Control Module has the latest calibration
    2. Replace the component: K59 Starter/Generator Control Module.
    • Go to next step: If the DTC is not set 
  3. All OK.
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